KR20010110880A - Shut-down method using general radio frequency repeater by inside attenuator - Google Patents

Shut-down method using general radio frequency repeater by inside attenuator Download PDF

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KR20010110880A
KR20010110880A KR1020000031537A KR20000031537A KR20010110880A KR 20010110880 A KR20010110880 A KR 20010110880A KR 1020000031537 A KR1020000031537 A KR 1020000031537A KR 20000031537 A KR20000031537 A KR 20000031537A KR 20010110880 A KR20010110880 A KR 20010110880A
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South Korea
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repeater
shut
attenuator
power amplifier
reverse path
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KR1020000031537A
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Korean (ko)
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허근
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배준진
주식회사 엔시테크놀로지
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Publication of KR20010110880A publication Critical patent/KR20010110880A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15507—Relay station based processing for cell extension or control of coverage area
    • H04B7/15514—Relay station based processing for cell extension or control of coverage area for shadowing compensation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15535—Control of relay amplifier gain

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radio Relay Systems (AREA)

Abstract

본 발명은 이동통신 무선중계기에 있어서, 무선중계기가 과출력 상태가 되면 역방향 경로(path)에 있어서, 무선중계기가 출력차단(shut-down)동작을 할 때 전력증폭기(Power Amplifier)의 전원차단에 의한 출력차단(shut-down)이 아닌 무선중계기의 역방향 경로(path)의 종단에 새로운 감쇠기(Attenuator)가 연동, 동작하는 내부 감쇠기에 의한 출력차단(shut-down)방법에 관한 것으로서, 종래의 출력차단(shut-down)방식은 각 경로(path)의 종단 증폭기(PA1, PA2)의 전원차단에 의한 출력차단(shut-down)방식 이나 무선중계기의 출력차단(shut-down)방식에 전력 증폭기(Power Amplifier)의 전원차단에 의한 출력차단(shut-down)이 아닌 무선중계기 내부의 역방향 경로(path)에서 종단의 듀플렉스와 연결된 전력증폭기(Power Amplifier)와 상기 전력증폭기(Power Amplifier)와 연결된 구동증폭기(Drive amplifier) 사이에 새로운 감쇠기(Attenuator)를 구성하여 상기 내부 감쇠기에 의한 출력차단(shut-down)을 하는 것이다.According to the present invention, when the wireless repeater is in an over-output state in a mobile communication wireless repeater, the power repeater is turned off when the wireless repeater performs a shut-down operation in a reverse path. The present invention relates to a method of shut-down by an internal attenuator in which a new attenuator is interlocked with and operated at the end of a reverse path of a radio repeater rather than a shut-down caused by a shut-down. Shut-down method uses a power amplifier (Shut-down) by the power-off of the termination amplifier (PA1, PA2) of each path (Shut-down) or output-shutdown (down) method of the wireless repeater. The power amplifier connected to the duplex of the terminal and the driving amplifier connected to the power amplifier in the reverse path inside the wireless repeater, not the shutdown of the power amplifier. (Drive amplifier) The new attenuator is configured to shut down the internal attenuator.

Description

일반 무선중계기에 적용하는 내부 감쇠기에 의한 출력차단 방법{Shut-down method using general radio frequency repeater by inside attenuator}Shut-down method using general radio frequency repeater by inside attenuator}

본 발명은 이동통신 무선중계기에 있어서, 무선중계기가 과출력 상태가 되면 역방향 경로(path)에 있어서, 중계기가 출력차단(shut-down)동작을 할 때 전력증폭기(Power Amplifier)의 전원차단에 의한 출력차단(shut-down)이 아닌 무선중계기 내부의 역방향 경로(path)에서 종단의 듀플렉스와 연결된 전력증폭기(Power Amplifier)와 상기 전력증폭기(Power Amplifier)와 연결된 구동증폭기(Drive amplifier) 사이에 감쇠기(Attenuator)가 연동, 동작하는 내부 감쇠기에 의한 출력차단(shut-down) 방법에 관한 것이다.According to the present invention, when the wireless repeater is in an over-output state in the mobile communication wireless repeater, the power amplifier is turned off when the repeater shuts down in the reverse path. An attenuator between the power amplifier connected to the duplex of the terminal and the drive amplifier connected to the power amplifier in the reverse path inside the wireless repeater, not the shut-down. The present invention relates to a shut-down method by an internal attenuator in which an attenuator is interlocked and operated.

종래의 중계기에 적용하는 출력차단(shut-down) 방식은 각 경로(path)의 종단 증폭기 (PA1, PA2)의 전원차단에 의한 출력차단(shut-down) 방식으로서, 종단 증폭기 (PA1, PA2)가 과출력 상태가 되어 출력을 검출하고 직류(DC)로 변환하여 컨트롤러인 중앙처리장치(CPU)에서 설정해준 기준치와 상대 비교하여 기준치가 넘는 경우 컨트롤러, 즉 중앙처리장치(CPU)에서 증폭기 (PA1, PA2)로 가는 전원을 릴레이의 스위칭으로 차단하는 전원차단 방식으로 동작하는 것이다.The conventional shut-down method applied to the repeater is a shut-down method by turning off the power of the termination amplifiers PA1 and PA2 in each path, and the termination amplifiers PA1 and PA2. Is over output, detects the output, converts it to direct current (DC), and compares it with the reference value set by the central processing unit (CPU). , PA2) is operated by a power off method that cuts off the power to the relay.

본 발명은 무선중계기가 과출력 상태가 되면, 역방향 경로(path)에 있어서, 기지국에 영향을 미치는 것을 최대한 방지하기 위하여 무선중계기의 동작에서 역방향 경로(path)에 구성연결한 내부 감쇠기(Attenuator)의 이득감쇠(Gain Attenuation)방식으로 과출력을 차단하는 것이다.According to the present invention, when the radio repeater is in an overpower state, in order to prevent the base station from affecting the base station in the reverse path, the internal attenuator of the internal attenuator configured and connected to the reverse path in the operation of the radio repeater may be used. The gain attenuation method is to cut off the overpower.

종래의 중계기가 과출력 상태일 경우 종단 증폭기 (PA1, PA2)의 전원차단에 의한 출력차단에 의한 것으로서 전원을 차단할 경우 통신에 있어서 통화불능의 경우가 많이 발생하였다.When the repeater is in the over-output state, it is caused by the output cutoff by the power cutoff of the terminating amplifiers PA1 and PA2.

따라서, 본 발명은 종래의 이러한 문제를 해결하기 위하여 안출된 것으로,무선중계기가 과출력 상태일 경우 역방향 경로(path)에 있어서, 중계기의 출력차단(shut-down)방식에서 전력증폭기(Power Amplifier)의 전원차단에 의한 출력차단(shut-down)이 아닌 중계기의 내부에 새로운 감쇠기(Attenuator)를 역방향 경로(path)에 구성하여 중계기내의 새로운 내부 감쇠기에 의한 이득감쇠(Gain Attenuation)를 하므로 전체이득을 0㏈로 하여 입력신호를 증폭작용 없이 그대로 바이패스하여 0㏈에서도 통화불능의 경우가 없도록 하여 보다 높은 통신률을 기록하는데 발명의 목적이 있다.Accordingly, the present invention has been made to solve such a problem in the prior art, when the wireless repeater is in the output state in the reverse path (path), the power amplifier in the output (shut-down) method of the repeater (Power Amplifier) Gain attenuation by gain attenuation by new internal attenuator in repeater by constructing new attenuator in reverse path, not in shutdown of power off It is an object of the present invention to record a higher communication rate by bypassing the input signal as it is 0 kHz without amplification so that there is no communication failure even at 0 ㏈.

상기와 같은 목적을 실현하기 위한 본 발명은 이동통신 무선중계기에 있어서, 중계기의 출력차단(shut-down)방식에서 전력증폭기(Power Amplifier)의 전원차단에 의한 출력차단(shut-down)이 아닌 이득감쇠(Gain Attenuation)에 의한 중계기의 역방향 경로(path)에 구성된 새로운 내부 감쇠기 작용의 출력차단(shut-down)방법에 관한 것이다.The present invention for realizing the above object is a gain in the mobile communication wireless repeater, the output is not a shutdown (shut-down) due to the power-off of the power amplifier in the output (shut-down) method of the repeater A method of shut-down of a new internal attenuator action configured in the reverse path of a repeater by gain attenuation.

도 1은 본 발명에 따른 무선중계기 블록도,1 is a wireless repeater block diagram according to the present invention,

도 2는 본 발명에 따른 무선중계기 흐름도.2 is a flowchart of a wireless repeater according to the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1, 2 - 듀플렉스(Full duplex)1, 2-full duplex

11, 17 - 저잡음 증폭기(Low noise amplifier)11, 17-low noise amplifier

12, 13, 14, 15, 16, 18, 19, 20, 21, 22 - 구동 증폭기(Drive amplifier)12, 13, 14, 15, 16, 18, 19, 20, 21, 22-drive amplifier

31, 32 - 전력 증폭기(Power Amplifier)31, 32-Power Amplifier

51, 52 - 감쇠기(Attenuator)53 - 감쇠기51, 52-Attenuator 53-Attenuator

71, 72, 73, 74 - 필터(Filter)71, 72, 73, 74-Filter

91 - 콘트롤러(CPU)91-Controller (CPU)

본 발명의 구성 및 작용효과를 첨부된 예시도면에 의거하여 설명하면 다음과 같다.Referring to the configuration and operation of the present invention based on the accompanying drawings as follows.

본 발명은 첫째, 중계기가 과출력 상태일 경우 중계기의 출력차단(shut-down)방식에서 전력 증폭기(Power Amplifier)의 전원차단에 의한 종래의 출력차단(shut-down)이 아닌 중계기 내부의 역방향 경로(path)에서 종단의 듀플렉스와 연결된 전력증폭기와 상기 전력증폭기와 연결된 구동증폭기 사이에 새로운 감쇠기(53)를 구성하여 상기 내부 감쇠기(53)에 의한 출력차단(shut-down)이 되도록구성한 것이다.First, when the repeater is in an over-output state, the reverse path inside the repeater is not a conventional shut-down due to the power-off of the power amplifier in the shut-down method of the repeater. In the path, a new attenuator 53 is formed between the power amplifier connected to the duplex of the terminal and the driving amplifier connected to the power amplifier so as to be shut down by the internal attenuator 53.

둘째, 중계기 최초동작시 중계기의 이득이 그대로 증폭되는 것이 아니라 내부 이득 감쇠기(Attenuator)가 최대로 동작하고 수신신호를 감지하여 수신신호 세기에 따라 감쇠가 풀리면서 이득이 셋업되는 것이다.Second, the gain of the repeater is not amplified in the initial operation of the repeater, but the internal gain attenuator operates to the maximum, and the gain is set up as the attenuation is solved according to the received signal strength.

간단히 말하면, 수신신호가 감지되기 전에 최대이득상태로 동작하느냐 최소이득 상태로 동작하느냐의 차이인데 본 발명은 최소이득 상태로 동작하는 것이다.In short, it is a difference between operating in the maximum gain state or the minimum gain state before the received signal is detected, but the present invention operates in the minimum gain state.

예시도 1을 참조하여 작용을 설명하면 종래의 중계기 구성에 있어서 역방향 경로(path)에 구성된 내부 감쇠기(53)의 역할자체가 이득감쇠(Gain Attenuation)동작을 할 때 역방향 경로(path)의 전체이득을 0㏈로 할 수 있는 영역(RANGE)에 있고, 다시 말하면, 역방향 경로(path)의 전체이득이 60㏈ 라고 하면, 역방향 경로(path)의 감쇠기(52)와 감쇠기(53)의 이득감쇠(Gain Attenuation)가 30㏈면 중계기의 전체이득은 0㏈가 되는 것이다.Illustrating the operation with reference to Figure 1, in the conventional repeater configuration, the overall gain of the reverse path when the role of the internal attenuator 53 configured in the reverse path performs a gain attenuation operation. Is in the range RANGE, where the total gain of the reverse path is 60 dB, the gain attenuation of the attenuator 52 and the attenuator 53 of the reverse path. If Gain Attenuation is 30 가, the total gain of repeater is 0㏈.

상기와 같은 경우 증폭도가 0㏈일 때 자체 잡음전력(Noise Power)이 ­58㏈m ∼ ­60㏈m이 유지되면 기지국 수신단까지의 경로손실(path Loss)을 감안하면 기지국 수신단에서의 수신감도는 언제나 최소 ­127㏈m을 유지할 수 있다.In this case, if the noise power of 58 dBm to 60 dBm is maintained when the amplification degree is 0 dB, the reception sensitivity at the base station receiving end is always minimum considering the path loss to the base station receiving end. Can maintain 127m

예를 들어 기지국 출력이 ＋37㏈m일 때 WORST CASE로 중계기 순방향 경로(path)에서의 수신전력이 ­40㏈m이라고 하면 이때의 경로손실(Pass Loss)은 77㏈이다. 상기와 같은 경우 출력차단(shut-down)시 중계기의 역방향 출력의 잡음전력(Noise Power)이 ­58㏈m ∼ ­60㏈m을 유지하므로 이 신호가 기지국에 도달할 때 최소 ­135㏈m이 되어 기지국 수신감도 영역인 ­127㏈m에는 영향을 주지 않으며, 기지국의 성능 및 효율 측면에서 전혀 문제가 발생하지 않는다.For example, when the base station output is +37 dBm and the reception power in the repeater forward path is 40 dBm with WORST CASE, the pass loss is 77 dB. In the above case, when the output is shut down, the noise power of the reverse output of the repeater is maintained at 58 to 60 dBm, so when the signal reaches the base station, the signal is received at least 135 dBm. It does not affect the sensitivity area of 127 dBm, and there is no problem in terms of performance and efficiency of the base station.

상기한 바와 같이, 본 발명은 역방향 경로(path)에서 출력차단(shut-down)동작으로 기지국에 영향을 끼치지 않으면서 물리적인 통신경로상의 차단이 아니기 때문에 기지국과 단말기간의 통화는 언제나 유지되어 통화불능 상태가 없는 효과가 있으며, 다시 말해 중계기의 주요기능인 음영지역에 대한 통신서비스가 출력차단(shut-down)의 발생 유무에 상관없이 언제나 통화대기 상태가 보장된다는 효과가 있다.As described above, since the present invention is not blocking on the physical communication path without affecting the base station by shut-down operation in the reverse path, the call between the base station and the terminal is always maintained. In other words, there is an effect that there is no disable state, that is, the communication service for the shadow area, which is the main function of the repeater, has the effect that the call waiting state is always guaranteed regardless of the occurrence of shut-down.

또한, 예시도 2와 같이 최초 중계기가 동작할 때 중계기는 기본감쇠(30㏈)가 동작한 후 2㏈ 간격으로 증가하다가 순방향 수신신호의 세기에 따라 설정된 출력값(1㎽)에 일치하다는 점에서 감쇠는 정지되어 셋업되는 것이다.In addition, as shown in Fig. 2, when the initial repeater operates, the repeater increases at intervals of 2 ms after the basic attenuation (30 ms) is operated and then attenuates in accordance with the output value (1 ms) set according to the strength of the forward reception signal. Is stopped and set up.

상기의 경우, 최초 중계기 동작시 중계기에 의한 기지국에 미치는 영향을 방지하는 효과가 있다.In this case, there is an effect of preventing the influence on the base station by the repeater during the operation of the first repeater.

Claims (2)

이동통신 무선 중계기에 있어서, 중계기가 출력차단(shut-down) 동작을 할 때 중계기 내부의 역방향 경로(path)에서 종단의 듀플렉스와 연결된 전력증폭기(Power Amplifier)와 상기 전력증폭기(Power Amplifier)와 연결된 구동증폭기(Drive Amplifier) 사이에 새로운 감쇠기(53)를 구성하여 상기 내부 감쇠기(53)에 의한 출력차단(shut-down)이 되는 것을 특징으로 하는 일반 RF중계기에 적용하는 내부 감쇠기에 의한 출력차단 방법.In the mobile communication wireless repeater, when the repeater shuts down, a power amplifier connected to the end duplex and a power amplifier connected in the reverse path inside the repeater are connected to the power amplifier. An output attenuation method by an internal attenuator applied to a general RF repeater, characterized in that a new attenuator 53 is formed between the drive amplifiers so as to shut down the internal attenuator 53. . 제 1 항에 있어서, 무선중계기의 초기 셋업시 중계기의 역방향 경로(path)의 감쇠기(52)와 감쇠기(53)가 최대로 동작한 후 수신신호를 감지하여 수신신호의 세기에 따라 감쇠가 풀리면서 이득이 설정되어 중계기가 동작하는 것을 특징으로 일반 무선중계기에 적용하는 내부 감쇠기에 의한 출력차단 방법.The attenuator 52 and the attenuator 53 of the reverse path of the repeater are operated at the maximum during initial setup of the repeater, and the received signal is sensed to attenuate according to the strength of the received signal. An output attenuation method by an internal attenuator applied to a general wireless repeater, characterized in that the gain is set and the repeater operates.
KR1020000031537A 2000-06-09 2000-06-09 Shut-down method using general radio frequency repeater by inside attenuator KR20010110880A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188437A (en) * 1986-02-13 1987-08-18 Nec Corp Heterodyne repeater
JPH11225102A (en) * 1998-02-05 1999-08-17 Kokusai Electric Co Ltd Radio relay amplifier
JPH11331054A (en) * 1998-05-14 1999-11-30 Kokusai Electric Co Ltd Radio repeater
KR20010010813A (en) * 1999-07-23 2001-02-15 박춘호 an automatic control device for front and rear attenuators for a RF repeater and method therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188437A (en) * 1986-02-13 1987-08-18 Nec Corp Heterodyne repeater
JPH11225102A (en) * 1998-02-05 1999-08-17 Kokusai Electric Co Ltd Radio relay amplifier
JPH11331054A (en) * 1998-05-14 1999-11-30 Kokusai Electric Co Ltd Radio repeater
KR20010010813A (en) * 1999-07-23 2001-02-15 박춘호 an automatic control device for front and rear attenuators for a RF repeater and method therefor

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